Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4955
Number of amino acids:61
Molecular Weight:7174.66 Da
Theoretical pI:4.72


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)11.64%
Cysteine CYS (C)46.56%
Glutamic Acid GLU (E)46.56%
Aspartic Acid ASP (D)34.92%
Glycine GLY (G)11.64%
Phynylalanine PHE (F)46.56%
Isoleucine ILE (I)58.2%
Histidine HIS (H)00%
Lysine LYS (K)34.92%
Methionine MET (M)46.56%
Leucine LEU (L)1016.39%
Asparagine ASN (N)23.28%
Glutamine GLN (Q)00%
Proline PRO (P)58.2%
Serine SER (S)58.2%
Arginine ARG (R)23.28%
Threonine THR (T)11.64%
Tryptophan TRP (W)23.28%
Valine VAL (V)34.92%
Tyrosine TYR (Y)23.28%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC332
HydrogenH514
NitrogenN74
OxygenO86
SulphurS8

FormulaC332H514N74O86S8
Total Number of Atoms:1014


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    14230
Absorption 0.1% (=1 g/l)    1.983,   assuming all pairs of CYS residues form cystines

Ext. coefficient    13980
Absorption 0.1% (=1 g/l)    1.949,   assuming all CYS residues are reduced
Aromaticity:0.131

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 59.96

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[42.62, 21.31, 31.15]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:111.803
Grand average of hydropathicity (GRAVY):0.56